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python开发手机网站开发,什么软件可以免费引流,net快速建站,上海建设银行网站转账记录查询编译OpenWrt的应用程序可以参考OpenWrt内部其他应用程序的例程，来编写成自己的应用程序一、OpenWrt源代码获取与编译 1.1、搭建环境下载OpenWrt的官方源码： git clone https://github.com/openwrt/openwrt.git1.2、安装编译依赖项 sudo apt update…

编译OpenWrt的应用程序可以参考OpenWrt内部其他应用程序的例程，来编写成自己的应用程序

一、OpenWrt源代码获取与编译

1.1、搭建环境

下载OpenWrt的官方源码：

git clone https://github.com/openwrt/openwrt.git

1.2、安装编译依赖项

sudo apt update -y
sudo apt full-upgrade -y
sudo apt install -y ack antlr3 asciidoc autoconf automake autopoint binutils bison build-essential \
bzip2 ccache cmake cpio curl device-tree-compiler fastjar flex gawk gettext gcc-multilib g++-multilib \
git gperf haveged help2man intltool libc6-dev-i386 libelf-dev libglib2.0-dev libgmp3-dev libltdl-dev \
libmpc-dev libmpfr-dev libncurses5-dev libncursesw5-dev libreadline-dev libssl-dev libtool lrzsz \
mkisofs msmtp nano ninja-build p7zip p7zip-full patch pkgconf python2.7 python3 python3-pyelftools \
libpython3-dev qemu-utils rsync scons squashfs-tools subversion swig texinfo uglifyjs upx-ucl unzip \
vim wget xmlto xxd zlib1g-dev python3-setuptools

1.3、更新 feeds

进入openwrt目录后执行以下指令


./scripts/feeds update -a
./scripts/feeds install -a

1.4、配置编译选项

根据自己的平台来选择编译选项

make menuconfig

1.5、下载 dl 库

进入openwrt目录后执行以下指令

make download -j8

1.6、编译

make V=s -j1

二、OpenWrt应用源代码分析

OpenWrt应用源代码存放目录为package/utils
在这里插入图片描述
以fbtest应用程序为例进行分析。在fbtest文件夹下面有一个Makefile文件和src文件夹，而src文件夹下有模块源码fbtest.c和源码编译Makefile

2.1、顶层makefile分析

顶层makefile内容如下

#
# Copyright (C) 2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#include $(TOPDIR)/rules.mkPKG_NAME:=fbtest
PKG_RELEASE:=1PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)include $(INCLUDE_DIR)/package.mkdefine Package/fbtestSECTION:=utilsCATEGORY:=UtilitiesTITLE:=Frame buffer device testing toolDEPENDS:=@DISPLAY_SUPPORT
endefdefine Build/Configure
endefdefine Build/Compile$(MAKE) -C $(PKG_BUILD_DIR) \CC="$(TARGET_CC)" \CFLAGS="$(TARGET_CFLAGS) -Wall" \LDFLAGS="$(TARGET_LDFLAGS)"
endefdefine Package/fbtest/install$(INSTALL_DIR) $(1)/usr/sbin$(INSTALL_BIN) $(PKG_BUILD_DIR)/fbtest $(1)/usr/sbin/
endef$(eval $(call BuildPackage,fbtest))

2.2、源码makefile

CC = gcc
CFLAGS = -Wall
OBJS = fbtest.oall: fbtest%.o: %.c$(CC) $(CFLAGS) -c -o $@ $<fbtest: $(OBJS)$(CC) -o $@ $(OBJS)clean:rm -f fbtest *.o

2.3、源码fbtest.c

fbtest.c就是应用程序的实际代码

三、编写自己的OpenWrt应用代码

将fbtest文件夹复制为myapp_test，放置到fbtest相同的目录下

3.1、顶层makefile

修改顶层makefile如下：

#
# Copyright (C) 2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#include $(TOPDIR)/rules.mkPKG_NAME:=myapp_test
PKG_RELEASE:=1PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)include $(INCLUDE_DIR)/package.mkdefine Package/myapp_testSECTION:=utilsCATEGORY:=UtilitiesTITLE:=Frame buffer device testing toolDEPENDS:=@DISPLAY_SUPPORT
endefdefine Build/Configure
endefdefine Build/Compile$(MAKE) -C $(PKG_BUILD_DIR) \CC="$(TARGET_CC)" \CFLAGS="$(TARGET_CFLAGS) -Wall" \LDFLAGS="$(TARGET_LDFLAGS)"
endefdefine Package/myapp_test/install$(INSTALL_DIR) $(1)/usr/sbin$(INSTALL_BIN) $(PKG_BUILD_DIR)/myapp_test $(1)/usr/sbin/
endef$(eval $(call BuildPackage,myapp_test))

3.2、源码makefile

CC = gcc
CFLAGS = -Wall
OBJS = myapp_test.oall: myapp_test%.o: %.c$(CC) $(CFLAGS) -c -o $@ $<myapp_test: $(OBJS)$(CC) -o $@ $(OBJS)clean:rm -f myapp_test *.o

3.3、源码myapp_test.c


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <fcntl.h>int main (int argc,char **argv)
{printf ("myapp_test\n");return 0;
}